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SERVICE MANUAL
LM520i Monitor
(With CPTXG08 PANEL)
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY
REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL;
WE CANNOT GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF
PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATA Feb-22-04
TABLE OF CONTENTS
PAGE
1. SPECIFICATIONS .................................................................................................... 3
1-1 GENERAL SPECIFICATIONS .................................................................... 3
1-2 LCD MONITOR DESCRIPTION .................................................................. 4
1-3 INTERFACE CONNECTOR ........................................................................ 4
2. PRECAUTION AND NOTICES ................................................................................ 5
2-1 ASSEMBLY PRECAUTION ......................................................................... 5
2-2 OPERATIONG PRECAUTION ..................................................................... 5
2-3 STORAGE PRECAUTION ........................................................................... 5
2-4 HIGH VOLTAGE WARNING ....................................................................... 5
3. OPERATING INSTRUCTIONS ................................................................................ 6
4. ADJUSTMENT .......................................................................................................... 7
4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS ............................... 7
4-2 ADJUSTMENTS METHOD .& DESCRIPTION........................................... 7
4-3 FRONT PANEL CONTROL KNOBS ............................................................ 8
5. CIRCUIT & SOFTWARE DESCRIPTION ................ 9
5-1 THE DIFFERENT BETWEEN EACH PANEL .................................. 9
5-2 SPECIAL FUNCTION WITH PRESS KEY ...................................... 10
5-3 SIMPLE INTRODUCTION ABOUT LM500 CHIPSET ........................ 11
5-4 SOFTWARE FLOW-CHART 13
6. TROUBLE SHOOTING............................................................................................. 15
A).MAIN BOARD TROUBLE SHOOTING CHART .. .................................... 15
B). INVERTER - MODULE TROUBLE SHOOTING CHART ........................... 19
7. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY...................................... 21
8. PARTS LISTING ..................................................................................................... 22
9. SCHEMATIC................................................................................................ 34
10. PCB LAYOUT ................................................................................................... 37
2
1. SPECIFICATIONS FOR LCD MONITOR
1-1 General specifications
1. LCD-PANEL :
Active display area 15 inches or 15.1 inches diagonal
Pixel pitch 0.297 mm x 0.297 mm
Pixel format 1024 x 768 RGB vertical stripe arrangement
2. Display Color :
6-bit, 262144 colors or 8-bit, 16.7 million colors
3. External Controls :
a).Power On/Off, Auto key, Rotary-knob ( for shuttle)
b).Power On/Off, Auto key, Left key, Right key ( for 4-key )
OSD menu Controls
Contrast, Brightness, Focus, Clock,H-position, V-position, Language, Recall-C2(warm color), Recall-C1 (Cool
color), Reset, Exit-OSD, Red, Green, Blue
4. Input Video Signal :
Analog-signal 0.7Vpp
Video signal termination impedance 75 OHM
5. Scanning Frequencies :
Horizontal: 29 KHz - 63 KHz
Vertical: 55 Hz